<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加用户按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <!-- 动态绑定样式 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套 渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 渲染二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column
          type="index"
          label="序号"
          width="50px"
          align="center"
        ></el-table-column>
        <el-table-column
          label="角色名称"
          prop="roleName"
          align="center"
        ></el-table-column>
        <el-table-column
          label="角色描述"
          prop="roleDesc"
          align="center"
        ></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleUserById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 点击添加用户 弹出对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!--内容主体区域 -->
      <el-form
        :model="addRoleForm"
        :rules="addRoleFormRules"
        ref="addRoleFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRoleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRoleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 点击编辑，修改用户的对话框 -->
    <el-dialog
      title="修改角色信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editRuleForm"
        :rules="editRuleFormRules"
        ref="editRuleFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRuleForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRuleForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRuleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 点击分配权限，弹出对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightsDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        ref="treeRef"
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
      >
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      //   添加角色对话框 默认不显示对话框 控制对话框的显示与隐藏
      addDialogVisible: false,
      //   添加角色表单数据
      addRoleForm: {
        roleName: "",
        roleDesc: "",
      },
      //   添加角色用户验证规则
      addRoleFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
      },
      //   编辑用户对话框 默认不显示对话框 控制对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到角色信息的对象
      editRuleForm: {},
      // 编辑角色的校验规则
      editRuleFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
      },

      // 分配权限对话框显示
      setRightDialogVisible: false,
      // 分配权限的所有数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        //用label接受字段名称
        label: "authName",
        // 用children实现父子关系节点的嵌套
        children: "children",
      },
      // 默认选中的节点Id值
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: "",
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    // 获取角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolelist = res.data;
      // console.log(this.rolelist)
    },
    // 监听添加用户dialog框关闭事件，关闭dialog框实现数据的重置
    addDialogClosed() {
      this.$refs.addRoleFormRef.resetFields();
    },
    // 点击按钮，添加新用户
    addRole() {
      // 实现角色的预验证功能
      this.$refs.addRoleFormRef.validate(async (valid) => {
        // console.log(valid)

        // 可以添加用户的网络请求
        if (!valid) return;
        const { data: res } = await this.$http.post("roles", this.addRoleForm);
        if (res.meta.status !== 201) {
          this.$message.error("添加用户失败");
        } else this.$message.success("添加用户成功");
        // 添加成功   关闭dialog框
        this.addDialogVisible = false;
        // 更新角色列表数据
        this.getRolesList();
      });
    },
    // 监听编辑对话框事件
    async showEditDialog(id) {
      // 根据用户id查询数据，调用后台查询接口
      const { data: res } = await this.$http.get("roles/" + id);
      // console.log(id)
      //   console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error("查询角色失败!");
      }
      this.editRuleForm = res.data;
      this.editDialogVisible = true;
    },

    // 监听关闭编辑对话框表单重置事件
    editDialogClosed() {
      this.$refs.editRuleFormRef.resetFields();
    },
    // 提交表单预验证，修改用户信息提交
    editRuleInfo() {
      this.$refs.editRuleFormRef.validate(async (valid) => {
        // console.log(valid)
        // 校验不通过，return出去
        if (!valid) return;
        // 校验通过，发起修改用户数据请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editRuleForm.roleId,
          {
            roleName: this.editRuleForm.roleName,
            roleDesc: this.editRuleForm.roleDesc,
          }
        );
        console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error("修改角色失败！");
        }
        // 关闭对话框
        this.editDialogVisible = false;
        // 刷新列表数据
        this.getRolesList();
        // 提示修改成功
        this.$message.success("修改角色成功！");
      });
    },
    // 监听删除用户事件 根据用户id删除用户信息
    async removeRoleUserById(id) {
      //  先弹框进行提示用户是否删除，调用messageBox中的confirm函数
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      // 如果用户点击确认删除，则返回值为字符串 confirm
      // 如果用户点击取消,需要加上.catch(err =>{return err})，则返回值为字符串 cancel,如不加会报错
      // console.log(confirmResult)

      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      // 调用删除接口
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("删除角色失败");
      }
      this.$message.success("删除角色成功");
      //更新用户列表
      this.getRolesList();
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除！");
      }
      // console.log('确认删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      // this.getRolesList()
      // 直接调用获取用户的方法会导致展开栏的关闭,这样体验不好

      // 可以直接把返回的最新数据直接赋值
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 弹出对话框前要获取到所有权限数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限列表失败！");
      }
      // 获取到权限数据保存到rightsList中
      this.rightsList = res.data;
      // console.log(this.rightsList);
      // 递归获取三级节点
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前node没有children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      // 每循环一项拿到一个子节点，然后用字节点当做新的重新调用getLeafKeys函数
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightsDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if(res.meta.status !== 200){
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
};
</script>

<style lang='less' scoped>
.el-tag {
  margin: 10px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
